Windows 64: Enabled lwjgl64.dll and fixed crash

src/java/org/lwjgl/WindowsSysImplementation.java

@@ -64,6 +64,10 @@ final class WindowsSysImplementation extends DefaultSysImplementation {
 	}
 	private static native long nGetTime();
 
+	public final boolean has64Bit() {
+		return true;
+	}
+
 	private static long getHwnd() {
 		if (!Display.isCreated())
 			return 0;

src/native/common/common_tools.c

@@ -68,7 +68,7 @@ bool isDebugEnabled(void) {
 }
 
 static jstring sprintfJavaString(JNIEnv *env, const char *format, va_list ap) {
-#define BUFFER_SIZE 4000
+#define BUFFER_SIZE 400
 	char buffer[BUFFER_SIZE];
 	jstring str;
 #ifdef _MSC_VER